package com.example.demo.interceptor;


import com.example.demo.constant.Constant;
import com.example.demo.model.UserInfo;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

@Slf4j
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        log.info("preHandle目标方法执行前...");
        System.out.println("Request URL: " + request.getRequestURL()); // 打印请求的 URL
        //true 放行, false 拦截
        HttpSession session = request.getSession(false);
        if (!checkUser(session)){
            response.setContentType("text/html;charset=utf-8");
            response.setStatus(401);
            String msg = "用户未登录";
            response.getOutputStream().write(msg.getBytes("UTF-8"));
            return false;
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        log.info("postHandle.....");
    }

    public boolean checkUser(HttpSession session){
        if (session == null || session.getAttribute(Constant.SESSION_USER_KEY)==null){
            log.warn("用户未登录");
            //用户未登录
            return false;
        }
        UserInfo userInfo = (UserInfo)session.getAttribute(Constant.SESSION_USER_KEY);
        if (userInfo==null || userInfo.getUId()==null){
            log.warn("用户未登录");
            return false;
        }
        log.info("用户已登录");
        return true;
    }

}
